<template>
  <div>
    <el-row type="flex" justify="end">
      <el-select v-model="currentYear" size="small" style="width: 120px" @change="dateChange">
        <el-option v-for="item in yearList" :key="item" :label="item" :value="item">{{ item }}</el-option>
      </el-select>
      <el-select v-model="currentMonth" size="small" style="width: 120px;margin-left:10px" @change="dateChange">
        <el-option v-for="item in 12" :key="item" :label="item+'月'" :value="item">{{ item }}</el-option>
      </el-select>
    </el-row>
    <el-calendar v-model="currentDate">
      <template v-slot:dateCell="{ date, data }" class="content">
        <div class="date-content">
          <span class="text"> {{ data.day | getDay }}</span>
          <span v-if="isWeekend(date)" class="rest">休</span>
        </div>
      </template>
    </el-calendar>
  </div>
</template>

<script>
export default {
  filters: {
    getDay(originDay) {
      const newDate = originDay.split('-')[2]
      return newDate.startsWith('0') ? newDate.substr(1) : newDate
    }
  },
  data() {
    return {
      currentMonth: null, // 当前月份
      currentYear: null, // 当前年份
      currentDate: new Date(),
      yearList: []
    }
  },
  created() {
    this.getYearList()
  },
  methods: {
    //   是否周末 处理函数
    isWeekend(date) {
      return date.getDay() === 6 || date.getDay() === 0
    },
    // 改变时间，日期跟着改变
    dateChange() {
      this.currentDate = new Date(`${this.currentYear}-${this.currentMonth}-1`)
      console.log(this.currentDate)
    },
    // 日历：年月的获取 处理函数
    getYearList() {
      // 当前年
      this.currentYear = this.currentDate.getFullYear()
      // 当前月
      this.currentMonth = this.currentDate.getMonth() + 1

      // 1.for循环实现年的计算
      //   for (let index = 0; index < 11; index++) {
      //     this.yearList.push(index + this.currentYear - 5)
      //   }

      // 2.Array.from()方法实现年的计算
      // Array(11)：生成一个11位长度的空数组
      // Array.from(带有长度的数组,根据前面的数组创建一个新数组的方法：有两个参数：value：数组值，index：数组下标)
      this.yearList = Array.from(Array(11), (value, index) => index + this.currentYear - 5)
    }
  }
}
</script>

<style scoped>
 ::v-deep .el-calendar-day {
  height:  auto;
 }
 ::v-deep .el-calendar-table__row td,::v-deep .el-calendar-table tr td:first-child,  ::v-deep .el-calendar-table__row td.prev{
  border:none;
 }
.date-content {
  height: 40px;
  text-align: center;
  line-height: 40px;
  font-size: 14px;
}
.date-content .rest {
  color: #fff;
  border-radius: 50%;
  background: rgb(250, 124, 77);
  width: 20px;
  height: 20px;
  line-height: 20px;
  display: inline-block;
  font-size: 12px;
  margin-left: 10px;
}
.date-content .text{
  width: 20px;
  height: 20px;
  line-height: 20px;
 display: inline-block;

}
 ::v-deep .el-calendar-table td.is-selected .text{
   background: #409eff;
   color: #fff;
   border-radius: 50%;
 }
 ::v-deep .el-calendar__header {
   display: none
 }
</style>
